One product that is great at lifting algae off of rocks is called Oxy-Lift Defense. Although it won’t kill algae, it will quickly and easily lift it from the rocks.

Sharon, one thing to remember when reading my last post about Combating String Algae, is that if you have an abundant fish load, you have to compensate with more filtration, aquatic plants or natural bacteria to help bring your pond back into balance. Depending on your fish load, I would make sure your filtration system is built to handle your fish load and make sure you add some Water Hyacinth or Water Lettuce if possible. These aquatic plants are great at competing for the same food source as algae. Also, read more about the DefensePAC here.

Hopefully this helps!

I’m glad to here you are getting great results from our products!

As for your question, Both blue and black dyes will have the same sunlight filtering properties. It really comes down to a point of preference or like in Cheryl’s case, one color just may be a better option. Your right, in a sense, the more you use the darker the color, thus the longer the sunlight penetration will be restricted, but just know that using the recommended dosage rate on the bottle will get you to where you need to be.

Thanks for the comment!

If your pond has a lot of tannins in it, do you happen to have an abundance of leaves or twigs that fall into the pond? Limiting those, if possible, would help with the color.

Also, as for the Nature’s Blue Pond Dye or Black DyeMond Pond Dye. I would try the black if your pond has those brownish tannins in it. Blue and Brown usually won’t go well together in that situation. Hope this helps!